摘要： OracleAL16UTF16:Varchar2(N char) == Nvarchar(N) in SQL ServerVarchar2(N) ==Nvarchar(2*N) in SQL ServerOracleAL32UTF8:Varchar2(N char) == Nvarchar(3*N) in SQL ServerVarchar2(N) ==Nvarchar(3*2*N) in SQL Serverhttps://forums.oracle.com/forums/thread.jspa?threadID=709453&tstart=98&messageID=2788 阅读全文

摘要： 1. After creating index, there will be a statistics generated.2. After dropping the index, the statistics will be dropped together.When the clustered index of an indexed view is dropped, all nonclustered indexes and auto-created statistics on the same view are automatically dropped. Manually created 阅读全文